Digital battery

As the core of electric vehicles, power battery applications with the particularity and complexity. To say, have the last hundred years, not the power battery development is bad, but the oil industry and the automotive industry is too large outstanding technological progress. Power Battery experience in the manufacture of batteries, batteries, battery modules, batteries, four-level links, the whole power system, Laptop battery technology has repeatedly stressed the concept of necessity is: consistency, standardization steps. From a technical achievement levels, ranging from small battery-battery technology upgrade to power, not simply “addition” can be easily reached. Power Battery performance factors (power density, energy density, durability, safety, cost) rings linked, high-power and high energy prices on the development and manufacture of hard to take into account a long time a serious impact on the work of the high-power battery, High-Power exothermic phenomenon of the work of the security of the test battery, energy efficiency must be sacrificed in order to obtain a longer life, high energy density and safety risks. This is technically difficult to obtain a full range of meeting, but only to find a balance, but also with the vehicle fuel system that is the biggest challenge for technology comparison. Route choice in technology, nickel metal hydride batteries, native defects (self-discharge, specific energy is small), it was replaced by lithium batteries, only a matter of time. However, the lithium battery line, a series of disputes can the electrode materials, different systems of lithium manganese oxide have, lithium iron phosphate, nickel-and cobalt-manganese ternary and other technical line. Of the lithium iron phosphate battery technology A123Systems lost Chevrolet tender incidents, automobile manufacturers program the freedom of choice of batteries, for a variety of technical path to wait. We believe that automobile manufacturers’ lithium IBM ThinkPad R40 battery technology is not just over the line, more concerned about the patent dispute, suppliers, manufacturing capabilities and financial strength, etc., it is systemic issues. Main lithium-ion battery makers are still the most commonly used lithium manganese oxide system, Ni-Co-Mn and other technical way, as we believe that given the uncertainty in technological progress, lithium battery technology fronts will be difficult in the 2-3 years will have a clear statement does not preclude the international community, the first benefit of industrialization is the more mature xHEV lithium manganese, nickel, cobalt and other battery-Mn line. Battery is still in the global industrial R & D phase is uncertain, the domestic industry structure and outlook, it is certain that China is in the technical research and development of battery power, battery and vehicle research and development and improve the docking Power battery industry support intensity.

The direction of the battery lithium ion battery that can be in Japan and the United States of lithium-manganese-lithium-divided iron. Lithium manganese battery refers to the lithium manganese oxide cathode materials LiMn2O4 in propulsion. Lithium-iron Dell Latitude D510 battery refers to the lithium iron phosphate as cathode material LiFePO4 Power Battery. Us for a comparison:

Security

Lithium-ion battery charging and discharging process of lithium-ion embedding / de-embedding process. When the crystal structure in the process stability, not change is the battery of security to be high. Otherwise, is that is small, such as the layered structure of the cobalt oxide lithium battery charging voltage rises under the circumstances, the cathode material of lithium ion in the other continued to de-embedded to swim with the cathode, anode material at a time when the filled in the position to the location of the lithium-ion site was, lithium-ion only in the form of metal precipitation on the surface. Such problems arise. On the one hand, the surface of lithium metal deposition is very simple, formed a branch of the form, poly-lithium dendrites, the membrane-penetrating, leading to positive and negative direct short circuit, the other hand, lithium metal is very lively, is a direct response to the electrolyte and heat have, at the same time, the backup lithium is very low, although it is not the surface of the lithium metal dendrite membrane-penetrating, as long as the temperature is slightly higher, as the hp Pavilion DV1000 battery by heating by the discharge of lithium is -melt metal, so that positive and negative short-circuit, causing accidents. There is a high temperature and depth of the charge-discharge process, the cobalt and oxygen bond can be broken to release oxygen and produce an explosion. Lithium cobalt oxide battery temperature of only 150 degrees, the lowest of the three cathode materials. Therefore, the security of the largest lithium cobalt oxide is a short-board batteries.

Lithium manganese spinel crystal battery, lithium-ion embedding / de-embedding process is stable, secure high. The oxidation temperature of 250 degrees of lithium cobalt oxide batteries than a full 100 degrees higher. However, in the depths of the charging and discharging the material lattice Kawasaki (susceptible to changes, especially at the higher temperature), and manganese-oxygen bond can be broken to produce and release oxygen in an explosion. There is also a high temperature lithium-manganese oxide crystals slowly dissolved in the electrolyte problems. Lithium manganese battery and must therefore take a variety of security measures to improve security.

Lithium iron phosphate sony VGP-BPS2A battery is currently the safest battery. Its unique crystal structure of olivine in the phosphate-base for the entire material has a stabilizing effect, makes the material itself has thermal stability and good cycling performance. This is one of the key in the lithium iron phosphate lithium-ion differs from LiCoO2 cathode material of lithium cobalt oxide and lithium manganese LiMn2O4 with a one-dimensional direction of their mobility, the charge-discharge process can undo and be accompanied by extrusion, and move a central metallic iron oxidation and reduction. In addition, the phosphorus-oxygen bond and strong, so lithium batteries short-circuited, it is not because of the short circuit and produce an explosion. The oxidation temperature is higher than 400 degrees, can be placed on the fire. Therefore, increasing the cathode material lithium cobalt oxide and manganese-lithium battery for the safety had to take on a variety of means, while the cathode material lithium iron phosphate is a naturally have security.

Economy

How much do the cobalt to the high price of lithium cobalt oxide material. Manganese is rich in natural resources are cheap, while lighter lithium manganese preparation, manganese-lithium batteries and low cost. Phosphorus and iron-rich cheap, but difficult to lithium iron phosphate preparation for its low rate of sintering of the finished product, so that the material lithium iron phosphate battery costs. To reduce the cost of lithium iron phosphate a variety of methods, such as increased production, improved technology and so on.

High Capacity

Including the electrical power and voltage. Theory of the highest capacity in the lithium-cobalt, manganese and lithium the lowest. However, in order to assess the safety, the actual performance of lithium cobalt oxide of a compromise, only about half the theoretical capacity. Thing like this would, if you have to increase generating capacity to sacrifice safety. Security, high theoretical lithium manganese oxide with a low capacity means that there is not much scope for the development of electric power and up to 148mAh / g VGP-BPS10 with greater safety in comparison, lithium iron phosphate, it was made in the laboratory 160 mAh / g capacity of the actual performance. Of course, the operating voltage of lithium iron phosphate as low as 3.3. But it has a very flat voltage platform, which means it is more stable and efficient discharge properties.

Fast Charge

Speed of charge from the conductive material decision. There is no doubt the worst of lithium iron phosphate. This is because the lithium iron phosphate lithium-ion extrusion, reducing the volume of the grid, from which a total FeO6 octahedron corners, because they can not be separated by oxygen atoms to form a permanent FeO6 network structure, whereby the electronic conductivity. On the other side of the crystal in the oxygen atom near the main road of tightly packed six-party agreement, so that the lithium-ion offers only limited access, allowing lithium ions in the structure at room temperature in a very small migration rates. But that does not mean that lithium manganese oxide can be easily achieved fast loading. Because of its crystal structure of lithium iron phosphate is not stable, high current fast charge may mean that the bars come saki changes, the key of the manganese and oxygen can be broken, which means an explosion. By pair-doped lithium iron phosphate, for example, by adding carbon, cobalt and the like will be the conductivity is greatly increased. BYD experiments reported that his 10 minutes to the apple M8403 battery to 80% are filled.

Car battery is important, its function is to provide an electric starter, the engine starting or operating at low speed for the ignition system of motor and other electrical equipment. High-speed operation when the engine when the generator enough, the battery can store excess energy. Unfortunately, it is generally ignored by most people. I do not know the proper maintenance of batteries to keep it plenty of power, is an important part of vehicle maintenance. The following will introduce the conservation of car battery connected to knowledge and common sense, to help you better understands the use and maintenance of the battery to extend battery life.

Car battery car battery works the vast majority of lead acid batteries. In simple terms, it is a chemical energy into electrical energy capable of electrochemical devices. Lead acid battery in the positive and negative plates, bulkheads, shell, etc. electrolyte and wiring trailer hitch and the discharge of chemical reactions depend on the active positive plate (lead dioxide PbO2) and the negative active material (sponge of pure lead, Pb) in the electrolyte (sulfuric acid composition of H2SO4 and H2O water) and as a result. A standard 12V lead-acid hp Pavilion DV1000 battery contains six modules, each of the power of electricity is about 2V (one for each power supply has a positive and negative column: column is entered the positive sign “+”, dark brown negative column when a “-” sign in pale gray).

Traditional batteries will occur in the electrolyte is in decline is because the frame plate door with traditional batteries lead alloy of antimony, antimony will pollute the negative plate of pure lead sponge, weakened after the battery is fully charged in a Counter electromotive force resulting from the decomposition of excess water, a large number of oxygen and hydrogen, respectively, escaped from the positive plate and negative, so the reduction electrolyte.

Without maintenance (maintenance free) batteries into the design principles and traditions of the Dell Inspiron 9400 battery on a coherent strategy, the use of thicker plate materials, important difference is that the plate is consistent with lead calcium alloy. In the electrolysis reaction, it can reduce the flow of excessive burden, reduce the rate of vaporization of liquid, thus reducing the loss of electrolyte, compared to prolong battery life.

Discharge and load

In the year (discharge) process dioxide very edge of lead (positive), the spongy lead (negative), and sulfuric acid electrolyte chemical reaction occurs to produce the discharge of lead sulfate (PbSO 4) and d water (H2O), positive and negative plate the difference between reduced. Because the battery voltage depends on different electrode materials and electrolyte concentration, so the reaction after discharge, the battery loses power. Charging process (charge) and discharge process to the contrary. Current in the generator under the action of sulphate of lead and water lead dioxide (positive), the spongy lead (negative) and sulfuric acid, plates, electrolyte concentration restored, the battery of energy.

Caution

1 to start the car every time startup should not exceed 3-5 seconds after starting interval of at least 10 seconds.

2 vehicles often short driving distance open-window open will result in a prolonged state of toshiba PA3395U-1BRS battery charge less to shorten the lifespan. On the highway driving at a constant rate of 20? 30 minutes, may give enough time to recharge the battery.

3, driving a day before leaving the car, check and ensure that all lights and other electrical appliances (such as radios, CD) has been closed. Because it may drain your battery.

4, if the battery runs out, to ask the fire (Jump-Start, also known as tie-lines) to begin immediately possible a constant speed (such as highway speed) drive at least 20? 30 minutes to fully charge the battery.

5, in the full discharge of the battery case, ask the fire may be unable to help you start your car. In this case, you must use a dedicated battery charger for slow charging.

6, where cars are not long-term investment should first fully charge the car. At the same time every month, launched his car, operation at medium speed for about 20 minutes. Otherwise, place too long, it would be difficult to start.

7 to understand the life of the VGP-BPS13/S battery. Using more than 4 years, proposed to replace

Introduction 1 battery is a UPS system is an important component of its direct impact on the bottom of the reliability of the whole UPS system. No matter how UPS designed for advanced features complete how, once the Laptop battery failure, even the best UPS is also unable to provide an uninterrupted power supply. Do not use inferior quality and cheap due to covet lead acid batteries, it will affect the reliability of the entire UPS system, and will therefore result in greater losses. Batteries entire UPS system mean time between failure (MTBF) over the game. If the use and proper maintenance, will be able to extend its life, instead of his life will be shortened. Therefore, we must understand the basic principles and considerations of the use of the battery.

Two general types of lead-acid batteries can be divided into lead acid batteries, maintenance free lead-acid batteries and nickel-cadmium batteries, taking into account the load conditions, the use of environment, life and cost and other factors, typically chosen UPS VRLA maintenance free batteries. Its main feature is the load generated when the cathode side oxygen by chemical reaction in the negative to reduce water use life float specified without adding water to maintain, so called maintenance free lead-acid batteries. Maintenance free battery is only when compared to the normal process eliminates the need to add water or distilled water, adjust the surface of the electrolyte of the work is not relieved all maintenance work. Instead, to achieve the UPS uninterruptible power supply, we must be more careful in safeguarding and maintaining good lead-acid maintenance-free batteries.

Three main factors affect the life and warn us about the following important factors affecting the life of the hp Pavilion DV1000 battery and use the process should pay attention to the questions:

⑴ temperature greater impact on the battery. The ambient temperature is too high, the battery will overload produces gas, the temperature is too low, the battery will be pretty cool, it will affect battery life. Therefore, the general provisions of the ambient temperature around 25 ℃, UPS is also float temperature setting voltage. Practical applications, the battery is generally 5 ℃ ~ 35 ℃ in the office, below or above 5 ℃ to 35 ℃ will greatly reduce battery capacity and shorten battery life.

⑵ deep discharge of battery life also has a great influence. More depth of battery discharge, less the number of recycling activities, and should therefore avoid the use of depth of discharge. Although the UPS has a battery low protection potential, the general single-cell, when discharged to 10.5 V or more, UPS will automatically be closed. However, if the UPS is lightly loaded or discharge any discharge load may cause the depth of battery discharge.

⑶ batteries in the storage, transportation, installation, following the loss of part of the self-discharge capacity. Therefore, after installation before commissioning should be based on the open circuit voltage of the toshiba PA3191U-3BRS battery to determine the remaining capacity of the battery, then a different approach to supplement charging batteries. Set aside extra batteries every 3 months should be an additional charge. Perhaps by measuring the voltage of the battery open circuit to determine if the battery is good or bad. For 12 V batteries, for example, if the open circuit voltage is above 12.5 V, the energy storage battery, said there are more than 80%, if the open circuit voltage less than 12.5 V You should immediately supplement charge. If the open circuit voltage less than 12V, the battery stores electrical energy, said less than 20%, the battery useless.

⑷ battery charge and discharge generally expressed C, C is the actual value associated with the battery capacity. For example, batteries 100AH, C = 100A. Matsushita Lead-acid maintenance-free battery charging current is 0.1C best on the market, the charging current can not exceed 0.3c. Charging current is too large or too small will affect apple M8403 battery life. The current requirements for general discharge of 0.05C between ~ 3C, UPS, normal use can satisfy this requirement, but must also prevent the occurrence of unexpected situations, such as the battery short-circuit and so on.

⑸ Load Voltage in the work of backup UPS battery, electricity is in the state of charge under normal circumstances, only the power outage is discharged. To extend the battery, UPS shippers typically use constant pressure to limit the control over the way, the battery is fully charged state to float after each section on the current float is set at 13.6 . If the charging voltage is too high causes the battery before charging, the battery is charging less than the contrary. The charging voltage abnormality may be caused by configuration errors caused by the battery or charger malfunction due. Therefore, when installing the battery, the battery must pay attention to the accuracy of the specifications and quantities of different specifications, different batches of cells do not mix. Do not use inferior charger, plus a charger, but also to consider when installing problem of heat dissipation. Currently, to further improve the life of the battery, UPS has developed and adopted a kind of ABM (Advanced Battery Management) three-stage program of intelligent BATCL50L battery management, ie load is divided over initialization, floating charge and rest three stages: the first step is constant load balance flows, recharge the battery capacity to 90%; second stage is floating Chong Chongdian load capacity battery at 100% and then stops charging, third step is a natural discharge at this stage, the battery using its own leakage current discharge, as the minimum voltage required, and then repeat these three steps. In this way, the nature of changes that were previously fully charged, even after the battery during the day to 24 hours of floating state, thereby extending battery life.

⑹ Following the interview without system battery electrolyte absorption in normal use will not produce any gas, but if the user is misused, causing the battery before recharging it will produce a gas, this time pressure increases the battery, battery pressure valve on top of open, burst out a serious cause of the battery.

⑺ UPS running the process, be careful to control the terminal value of battery voltage, current float value, each battery voltage, battery and the DC bus to ground resistance and the insulating state.

⑻ not individually increase or decrease the number of single charge of battery cells, resulting in the ability of imbalance single sony VGP-BPS2A battery charge and an uneven, reducing battery life.

⑼ the battery must be installed as far as possible in a clean, fresh, airy, dry, and avoid sunlight, radiators or other heat sources of radiation effects. Batteries should be placed on positive legislation, non-tilt. Each battery must be securely connected between the terminals.

⑽ regularly maintained. The battery in use after a certain time should be inspected regularly, as well as observations of their appearance is abnormal, measurement of the battery voltage is average and so on. If you are not a long term power outage, the battery is always in a state of charge, this would allow the activity of the deterioration of the battery. Thus, although power outages, UPS is also needed on a regular basis to test the discharge of the battery to make it active. Discharge test can usually be done in three months, the practice is UPS with a package - preferably 50% or more, then turn off the electricity, so that UPS is able to discharge the battery, the duration discharge by the battery capacity is usually in terms of a few milliseconds to tens of ms, the discharge to resume electricity supply, continue to charge the battery.

4 Conclusion and clearly understand the impact of lead-life battery acid, the main factors and the use of the procedure should pay attention to issues of our UPS system, use and maintenance of appropriate lead acid batteries are a great help. Hopefully, in their daily work, the proper use and maintenance of a good lead-acid batteries so as to obtain a more rational use.